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Crawler crane torque controlling method and apparatus under super lifting working condition

A technology of crawler cranes and cranes, applied in torque/mechanical power control, non-electric variable control, control/regulation systems, etc., can solve problems such as unprecedented and unlimited rear overturning moments, and the method is novel and easy to implement , the effect of easy operation

Inactive Publication Date: 2007-08-22
SHANGHAI SANY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general moment limiter can only limit the front overturning moment of the crane, and has no ability to limit the rear overturning moment
[0003] There is no precedent for the solution of the moment limit problem of the crane under the overlift condition

Method used

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  • Crawler crane torque controlling method and apparatus under super lifting working condition
  • Crawler crane torque controlling method and apparatus under super lifting working condition
  • Crawler crane torque controlling method and apparatus under super lifting working condition

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Embodiment Construction

[0031] The control method of the present invention and the structure of the device for realizing the method will be further described below in conjunction with the accompanying drawings.

[0032] Fig. 1 is the structure schematic diagram of the device of the present invention, as shown in Fig. 1, comprise buzzer 5 and indicator light 6, be placed on the tension sensor 1 on the main luffing pull rod of crane, be placed on the pressure on the lifting oil cylinder of super lifting counterweight The sensor 2, the controller 3 coupled with the buzzer 5, the indicator light 6, the tension sensor 1 and the pressure sensor 2, and the man-machine interface 4 coupled with the controller 3. Controller 3 is a central processing unit (CPU)

[0033] The tension sensor 1 is installed on the main luffing rod, and its signal output terminal is connected with the analog quantity input terminal of the controller 3; The input terminal is coupled to detect the pressure of the counterweight oil cy...

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PUM

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Abstract

A torque control method and device on the condition of superlift of a crawler crane takes the ratio of actual loading pressure and maximum permissible value of the crane main luffing rod as the main luffing percentage A, and the ratio of pull sum for crane superlift counterweight upgrading fuel tank and counterweight as the using percentage B to realize the torque control according to the relation of A and B. It also provides a method of achieving the above device, which includes: buzzers, lights, pull sensors set on the main luffing rod, pressure sensors on the superlift counterweight fuel tank, the controller coupled with the above components and the interface coupled with controller.

Description

technical field [0001] The invention relates to a method and a device for moment control, in particular to a method and a device for moment control of a crawler crane under the super-lifting working condition. Background technique [0002] In order to improve the lifting capacity of the crane, large cranes are equipped with super-lifting conditions. Under the overlift condition, due to the effect of the additional counterweight, when the front and rear moments are unbalanced, the crane may overturn both forward and backward. The general moment limiter can only limit the front overturning moment of the crane, and has no ability to limit the rear overturning moment. [0003] There is no precedent for solving the moment limit problem of the crane under the overlift condition. Contents of the invention [0004] The object of the present invention is to provide a moment control method and device capable of reliably and reasonably preventing the crane from overturning backward...

Claims

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Application Information

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IPC IPC(8): G05D17/02
Inventor 刘金江龙刚强谢军
Owner SHANGHAI SANY TECH
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